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McGregor said: “I think over the last few seasons, especially with the manager coming in, he’s taught us how to stay calm in the big moments.

Whether you go a goal up or a goal behind, it’s about keeping to the plan.

“You have to trust what the manager’s telling you and the players round about you.

“You’ve just got to try and draw on that experience. When the chips are down you just have to remember what you’ve come through before and how you’ve done it.

“Football’s a funny game. You probably never thought with the 5-0 game last year you’d end up hanging on.

“Maybe we can avoid getting into a situation like that.

“A game can change so quickly, there can be a goal either way which can change a tie. Suddenly a game can run away from you.

“You saw that half an hour in Astana. It was one of those moments we were all trying to get it together.

McGregor enjoys a laugh with Brendan Rodgers (Image: SNS)

“Thankfully we managed to recover and we won the game to go through.

“I think when the chips are down this group of players seem to find a way of winning.”

Rosenborg have all but written off their own chances but McGregor won’t fall for any mind games.

He said: “We try not to listen to what other teams are saying. They’ll quietly be confident that they can come and press and get after us and get an early goal. That’s the way they’ve got to try and play.

“They have to try and revive the tie.

“We’re under no illusions about what they’re going to try and do in terms of coming after us and pressing.

“We’ve been working on that while also looking at stamping our authority on the game also.”

Celtic will need cool heads to see it out but McGregor is convinced the Bhoys have become men on the big stage.

(Image: SNS)

He said: “We’ve come on a lot in terms of European performances and I think even when you look at our performance here last year it was a real professional display. It was mature. We had to get the goal but we also didn’t concede.

“I think that shows where we are in terms of maturity at this level as well.

“Hopefully, we can go out and deliver a similar performance and result. We know what we’ve got to do. We don’t need to take any risks and put any risk into the game. I think you’ll see a fairly mature performance.

“In our team there are goals from everywhere. It’s hard for them to focus on one or two, they’ve got to keep an eye on pretty much the front five players.

“We can back ourselves to come here and we can certainly create chances. If we can take one of them then it puts another margin between the teams and makes it a lot more comfortable for us.